So as Rotary Evolutions led me to investigate a little further , I have indeed found blown coolant seals . The bad part is this is my daily since my a4 blew its tranny . I have 2 other s4 , one is not being played with yet (project for another time. ) However I do have my S4 t2 with a rotted body . I want to swap only what I need , like the block , tranny driveshaft and diff . I plan to put in a sprint re aem coils s5 omp , running my evo8 550c . For now I want to keep the ht18 but I want to upgrade down the road . What should I do for an afm ? What should I do about the bac ? Im not buying a new one for 750 . My tii is basically block and turbo , no p/s no a/c no air pump . What else do I need to donate to my na from the t2 ?

 

search google, search the forum "S4 N/A to turbo swap." all will be answered. 3o minutes of reading will tell you a lot!

 

I do alot of searching and reading others builds . Unfortunately you miss some things . Like different bac and afm for a standalone setup . The little things

 

Dude.You don't need an AFM in a stand alone Turbo setup.
Hell you can get rid of half of your engine "pimples" and just run the Keg and injectors and sensors with a RE.
If you are putting in an Haltech RE, you don't need the N/A HARNESS.It's crap anyways as far as that goes.
That is half of the reason to go to a NEW Ecu Setup,to get rid of the 25 year old wiring.Use the harness that you can purchase or get with the ECU.

 

Now I knew the harness part , didnt know the afm . What about MAP sensor ?

 

Haltech has its own MAP built into the ECU

 

just to emphasize,that is the Map/Boost sensor..not a "fuel map"..
it is good to 22psi I believe.
Fuel..you have to program that yourself..

link to Specs on your "upgrade ECU"

http://www.haltech.com/product/plati...sprint-500-re/

 

Yeah I know about tuning fuel maps ignition timing etc , thanks styx so Ill keep that . What about idle(bac) valve ?